/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package ru.miit.elearning.servlets.pages;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author Cyclone
 */
public class ExceptionServlet extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {

            HttpSession session = null;
            if (((session = request.getSession()) != null) && (session.getAttribute("exception") != null)) {

                if(request.getParameter("clear") != null) {
                    session.removeAttribute("exception");
                    response.sendRedirect("Index");
                } else {

                Exception e = (Exception) session.getAttribute("exception");

                out.print("<p>Сохранённые в сессии детали об ошибке");

                out.print(": "+
                        (new Date((Long)session.getAttribute("currentTimeMillis")))
                        );


                out.print("</p>");

                out.print("<br/><a href='Exception?clear'><input type='button' value='Очистить'/></a><br/>");

                out.print("<br/>e.toString(): " + e);
                /*
                String message = null;
                if ((message = e.getLocalizedMessage()) != null) {
                    out.print("<br/>Localized message: " + message);
                }
                if ((message = e.getMessage()) != null) {
                    out.print("<br/>Message: " + e.getMessage());
                }
                */

                out.print("<br/>e.getMessage(): " + e.getMessage());
                out.print("<br/>e.getLocalizedMessage(): " + e.getLocalizedMessage());
                
                out.print("<p>Stacktrace:</p>");
                e.printStackTrace(out);

                
                }
            } else {
                out.print("<p>В сессии не сохранено деталей об ошибке</p>");
            }

        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
